Lock knife for looms



July 29,, 1930.

H. LANGFORD LOCK KNIFE FOR LOOMS Filed June 14, 1929 uvcutor J/emy Lcuggforai,

d 8 Cinorncgs Patented July 29, 1930 s UNITED STATES HENRY LANGFORD, OF WOONSOGIKET, RHODE ISLAND LOCK KNIFE FOR LOOMS Application filed June 14,

My present invention pertains to looms and more particularly to fancy woolen or worsted looms and it contemplates the provision of a simple and inexpensive lock-knife construction through the medium of which the lever-of a loom may be secured in its lowermost position.

The invention in all of its details will be 'fully understood from the following description and claim when the same are read in connection with the drawings accompanying and forming part of this specification, in

which- 7 Figure 1 is a sectional View of the assembled parts of a head motion of a woolen loom that illustrates the position of my novel lock knife relative to the main working parts of the loom and in connection with which I illustrate the improved knife in place.

Figure 2 is a perspective view of my novel lock-knife.

Similar numerals of reference designate corresponding parts in both views of the drawings. V

As is well known, a loom comprises among other elements, the members illustrated and consists of a cylinder gear 7 vibrator gear 8, connector arm 9, harness jack 10, the cam follower 11, the cam 14, the cylinder gear 15, the run 12, the pattern cylinder 3, the pattern chain 13, the vibrator lever 4: as well as the end 6 and the lever arm 5 which are all well known elements of a loom and form no part of my invention.

My novel device comprises the lock-blade 1 that is doubled beveled at both edges thereof as indicated by 2 and the said blade extends the full width of the head motion of the loom. Prior to my device, the blade used was merely a single beveled blade and only on one edge and it will be apparent from the following description that my novel blade 1s highly advantageous over the old construction.

In all looms as is well known a number of harnesses are mounted and said harnesses may be operated upwardly and downwardly independently of each other for the purpose of forming the pattern in the cloth. Manifestly any number of harnesses up to twenty- 1929. Serial No. 370,955.

four may be operated but as a rule four to six and sometimes eight to twelve are the greatits lowermost position because the end 6 of the lever is below the edge 2 of the knife 1. Should there be any of the levers 4 escaping to the elevated position the end 6 of said levers will be above the edge 2 of the knife and consequently in the above explained position of the knife it will be readily seen that all of the harness connections are locked against movement.

The continuous operation of the ends 6 of p the levers 4 causes the edges 2 of the knife 1 to wear away wherever the ends engage with the knife to such a degree that in time it becomes necessar to replace the blade with a new one. As efore stated due to the fact that the loom harness usually usedis less than one-half of the loom capacity there is only a small portion of the knife blade that is subjected to wear and therefore if the blade could be reversed and the unused portion of the knife edge brought into operative position quite a saving would result.

With my device I have provided means for accomplishing this saving by providing a double beveled edge blade and also I have devised that both edges be so beveled and it will be readily seen that the blade may be reversed end for end and after one edge has been used the other may be used.

Consequently the capacity of the blade is increased two fold and in most instances four fold and the cost of the knife over those at present in use is very small and is more than taken care of in the added use of the device.

I would distinctly have it understood that the blade is used without alterations of any part of the loom in the slightest degree and it is simply necessary to remove three or four bolts holding the old style of knife and replace same with my novel blade.

, What I claim is:

A blade for locking the harness equipment of looms and comprising a single piece 0i material adapted to be mounted on the lever 5 arm that is actuated by the cam follower of one cylinder and having double beveled edges formed therein.

In testimony whereof I have hereunto set my hand.

HENRY LANGFORD. 

